Senior Android Engineer
zain.ali.khalid1991@gmail.com
Islamabad, Pakistan
© 2026 Zain Ali Khalid. All Rights Reserved
Hire Me!Hello, I'm
Hi I'm Zain, an Android & Cross-Platform Engineer
I build reliable, secure and high-performance Android apps — from smart ticketing for metro and bus networks to payments, public-sector and consumer products used by millions. Lately I've been pushing into Jetpack Compose graphics, Flutter/Dart and web development, like this site.
8+
Years of
Experience
1M+
Users
Reached
5
Companies
Worked With
60%
Crash Reduction
Achieved
About Me
Building Android Apps
That Move Cities
I'm an Android Developer based in Islamabad, Pakistan, with 8+ years of experience designing, building and shipping mobile applications across public transport, public sector, payments, gaming and e-commerce.
My specialty is transit technology. I've worked hands-on with Automated Fare Collection (AFC), Automated Vehicle Location (AVL), handheld fare validators and Passenger Information Display (PID) systems for Islamabad Metro, Peshawar BRT and the Masar Bus Service in Makkah.
I care about clean architecture, real-time data and production reliability — and I've led teams to deliver apps with 1M+ users while cutting crashes by 60%.
Outside my day job I build custom Jetpack Compose graphics and animation from scratch — hand-worked 3D camera projection, physics-driven Canvas rendering, sensor-reactive UI — plus a Flutter/Dart app of my own (ForeverBook) and this site, which I built end-to-end.
portfolio
Featured Projects
my skills
Technical Expertise
The languages, frameworks and tools I use every day to ship production apps.
93%
Kotlin & Java
92%
Android SDK & Jetpack Compose
88%
Compose Graphics & Canvas
75%
Dart / Flutter
70%
Web Development
+6
90%
MVVM / Clean Architecture
85%
Coroutines & WorkManager
80%
Room DB, Realm & SQL
85%
REST APIs, SignalR & MQTT
85%
Firebase
55%
Python
What I Do
Services I Offer
End-to-end Android engineering, from architecture to Play Store release.
Native Android Development
Modern apps in Kotlin and Java with Jetpack Compose, MVVM and Clean Architecture — built to scale and easy to maintain.
Read MoreTransit & Smart Ticketing Solutions
AFC, AVL, handheld validators and passenger information display apps for bus and metro networks.
Read MorePayment Integration
Secure, production-grade payment flows including Mastercard / EMV and fare-processing workflows.
Read MoreReal-Time Features
Live tracking, chat and data sync using SignalR, MQTT, Firebase and WebSockets.
Read MorePerformance & Reliability
Crash reduction, APK size optimisation and speed improvements for existing apps.
Read MoreTechnical Leadership
Leading small engineering teams, code reviews, architecture decisions and on-time delivery.
Read MoreMy Resume
Experience & Education
Application Designer — LMKR
Android apps for large-scale bus and metro systems (Islamabad Metro, Peshawar BRT, Masar Bus Makkah) covering AFC, AVL, fare validators and PID. Implemented Mastercard payment solutions and real-time workflows with Kotlin, Coroutines, SignalR and WorkManager.
Android Developer — National Information Technology Board (NITB)
Built secure, privacy-focused public-sector apps. Designed Room DB and Repository-pattern data layers with reliable sync to web platforms, working closely with UI/UX teams.
Android Developer — LMKT
Developed a high-growth trivia and gaming app with prizes and discounts. Integrated MQTT for real-time messaging and Red5Pro for low-latency live video.
Android Developer — Reactive Space
Delivered apps from design to deployment with Google Maps & Places, Firebase, Retrofit and location-based features.
Android Developer — QuellxCode
Implemented Firebase real-time chat, SQL databases, Retrofit networking and map features.
Bachelor of Computer Science — NUML, Islamabad
National University of Modern Languages. Foundation in software engineering, data structures, databases and mobile application development.
P@SHA ICT Awards 2026 — Gold Award, Transport
Contributed to TRVERSE, LMKR's transit platform, winner of Gold in the Transport category at Pakistan's P@SHA ICT Awards 2026.
Best Smart Ticketing Programme
Contributed to Peshawar BRT, winner at Transport Ticketing Global 2022.
Team Lead — Pass Track
Led 4 engineers and 1 designer to deliver an app serving 1M+ users.
Islamabad City App
Contributed to an app with $1M+ revenue, 50K+ DAU and a 4.8/5 rating.
LinkedIn Android Developer Expert
Recognised for Android development expertise on LinkedIn.
companies i've worked with
testimonial
What People Say
Huzaifa Durrani
LinkedIn Connection
"Zain's great to work with. Reliable, sharp, and just easy to deal with."
Mihaly Toth
Collaborator, Android & Flutter
"I've worked with Zain for a long time on Android and Flutter apps. He's dependable, skilled, and honestly just easy to work with."
Baiyu Liu
Collaborator, Data & Automation Projects
"We've worked on quite a few projects together, from AI data scraping to automated email systems. Zain's technically sharp and you can always count on him."
contact
Let's Work Together!
zain.ali.khalid1991@gmail.com
Have a project, a role, or an app idea in mind — Android, Flutter, or the web? Send me a message and I'll get back to you soon.
Send an Email